[Merge] lp:~unit193/ubuntu-release-upgrader/core-upgrades into lp:ubuntu-release-upgrader

[Unit 193]

Not hearing back from them, I'd just go with lubuntu-artwork for lubuntu-core's keydeps or just drop it.  Want me to try and fix it all up?
-- 
https://code.launchpad.net/~unit193/ubuntu-release-upgrader/core-upgrades/+merge/250224
Your team Ubuntu Core Development Team is subscribed to branch lp:ubuntu-release-upgrader.